Yes, swirl is a Scrabble word!
...and is worth 8 points in Scrabble, and 9 points in Words with Friends
swirl
Verb
1. Turn in a twisting or spinning motion
2. Flow in a circular current, of liquids
Noun
1. The shape of something rotating rapidly
What Scrabble words can I make with the letters in swirl?
3 Letter Words
2 Letter Words